No, they don't, that is a ridiculously silly thing to say.
Have you ever tried binding Macs against a Linux Open Directory server? Good luck with that.
Moreover, have you ever tried to integrate your macs to an OD / AD golden triangle when your server platform is Linux?
You can replicate management on Linux. OD is, at it's core, LDAP. You can write your own MCX files and push them to your clients.
This is all an enormous amount of work that I can accomplish with a few clicks in OS X server.
Now given benefits generally cost 50% on top of salary.. Is it good or bad business move for a company to buy a $5K XServe instead of buying a $4k Linux box so you can have your expensive support staff spend endless hours managing a hand-rolled configuration? Even if you already have an LDAP server.. $5k buys a little over 2 weeks of my time with benefits. I work in EDU.. If I was a mid-Sr. Unix admin in the private sector, I'd probably be a more expensive.
BTW, there is no production-ready AD support for Linux other than through purchasing 3rd party apps (more cost).. and they make me nervous. Apple proved that it'd difficult to integrate into AD if you're not Microsoft.
Bottom line..
A server is a server.
A workstation is a workstation.
A desktop is a desktop.
and a mini is a toy.
A Mac Pro doesn't even qualify as a workstation, and certainly not a tower server.
- It's not rack mountable because the handles make it too wide for a 19" rack.
- It doesn't have tool-less power supplies and motherboards like any other major workstation vendor. Swapping MBs and PSs is downright difficult.
- It doesn't have redundant power supplies as an option like any enterprise server should. Even a decent SMB tower server should have a hot swap, redundant option in the product line.
- HP will ship me parts over night with a base workstation warranty. Dell will sign me up for Warranty Direct for free if I piggy back enrollment on a large order and they'll actually pay me to replace my own parts (over-nighted). Apple will insist on sending out a 3rd party repair company if I've got Extended Apple Care. They're supposed to be there next day, no 4 hour service available. (they've generally been good when we need them, but not always next-day)
There's a lot of posts here from people who have obviously never provided enterprise support. If you worked for me and you bought a desktop or a toy to run mission critical services, you'd deserve to get fired.
We pay good money for enterprise features because downtime is money. It can be A LOT OF MONEY, even in Edu when you've got distance learning in a VERY expensive master's program and the people in Singapore need to see the class stream. Even in the markets where people buy Apple servers (not the Board of Trade or Amazon..) a nights downtime can be worth tens of thousands of dollars.. easily.
As to where Apple's going..
I'm often wrong in guessing what's going on in Steve's head but the logical move is to allow licensing for VMWare ESX. OS X Server licensing already extends to VMWare Fusion (on Mac hardware of course).
Apple could easily announce a return to higher OS X Server license pricing for VMWare users. I'd be happy as a clam if I could run OS X Server in my VMWare ESX environment and sink the money that I spend on XServes into my virtualization infrastructure. I might even run more OS X Server.
Server hardware is so damn fast these days that most of my cycles sit idle anyway.. even in a ESX environment running 10 servers (mail, DB, web, filesharing...)
Unfortunately, I can see Jobs balking at this.